Green Lentil Vegetable Casserole

Featured in: Simple Sharing Plates

This hearty one-pot bake brings together protein-rich green lentils and a colorful medley of vegetables including onions, carrots, celery, bell peppers, zucchini, cherry tomatoes, and mushrooms. The vegetables are first sautéed to develop their natural sweetness, then simmered with lentils in vegetable broth infused with dried thyme, oregano, and smoked paprika. After stovetop cooking, the casserole finishes in the oven until bubbling and golden, with an optional sprinkle of Parmesan adding a savory finish. The result is a satisfying, nutrient-dense main that naturally accommodates gluten-free and vegan dietary needs while delivering deep, comforting flavors.

Updated on Mon, 26 Jan 2026 03:34:18 GMT
Freshly baked Green Lentil and Vegetable Casserole with golden, bubbly cheese topping from the oven. Pin It
Freshly baked Green Lentil and Vegetable Casserole with golden, bubbly cheese topping from the oven. | sweetsellou.com

This Green Lentil and Vegetable Casserole is a wholesome, hearty dish that combines protein-rich green lentils with a vibrant medley of seasonal vegetables. Baked to perfection, it serves as a comforting vegetarian main that is both nourishing and deeply satisfying.

Freshly baked Green Lentil and Vegetable Casserole with golden, bubbly cheese topping from the oven. Pin It
Freshly baked Green Lentil and Vegetable Casserole with golden, bubbly cheese topping from the oven. | sweetsellou.com

The beauty of this casserole lies in how the lentils soak up the aromatic flavors of smoked paprika, thyme, and oregano, while the addition of cherry tomatoes and mushrooms adds a wonderful depth to every bite.

Ingredients

  • Lentils: 1 cup (200 g) green lentils, rinsed; 3 cups (720 ml) vegetable broth (use gluten-free if needed).
  • Vegetables: 2 tablespoons olive oil; 1 large onion, diced; 2 garlic cloves, minced; 2 medium carrots, diced; 2 celery stalks, diced; 1 red bell pepper, chopped; 1 zucchini, chopped; 1 cup (150 g) cherry tomatoes, halved; 1 cup (150 g) mushrooms, sliced.
  • Seasonings: 1 teaspoon dried thyme; 1 teaspoon dried oregano; 1 teaspoon smoked paprika; 1/2 teaspoon ground black pepper; 1/2 teaspoon salt (adjust to taste); 2 tablespoons tomato paste; 1 bay leaf.
  • Topping: 1/2 cup (50 g) grated Parmesan or vegetarian hard cheese (optional); 1/4 cup (15 g) fresh parsley, chopped.
Product image
Make fresh homemade yogurt and fermented foods easily for breakfasts, snacks, and recipes.
Check price on Amazon

Instructions

Step 1
Preheat oven to 375°F (190°C).
Step 2
In a large saucepan, heat olive oil over medium heat. Add onion and garlic, sauté for 3–4 minutes until softened.
Step 3
Add carrots, celery, bell pepper, zucchini, mushrooms, and cherry tomatoes. Cook for 5–6 minutes, stirring occasionally, until vegetables begin to soften.
Step 4
Stir in lentils, tomato paste, thyme, oregano, smoked paprika, bay leaf, salt, and pepper. Mix well.
Step 5
Pour in vegetable broth and bring to a boil. Reduce heat and simmer uncovered for 20 minutes, stirring occasionally, until lentils are just tender.
Step 6
Remove the bay leaf. Transfer the mixture to a large ovenproof baking dish.
Step 7
Sprinkle with grated cheese, if using.
Step 8
Bake uncovered for 25 minutes, until the top is golden and bubbling.
Step 9
Remove from oven, let rest for 5 minutes, then garnish with fresh parsley before serving.

Zusatztipps für die Zubereitung

For an extra layer of flavor, consider adding a splash of balsamic vinegar to the mixture before transferring it to the baking dish. Always allow the casserole to rest for at least 5 minutes after baking to let the juices settle.

Varianten und Anpassungen

To make this dish vegan, simply omit the cheese or use your favorite plant-based cheese alternative. You can also vary the vegetables based on the season, adding ingredients like sweet potato, spinach, or kale for different textures.

Serviervorschläge

This casserole is a complete meal on its own, but it pairs wonderfully with a side of crusty bread to soak up the juices or a crisp green salad for a fresh contrast.

Green Lentil and Vegetable Casserole served in a white dish alongside crusty bread and a green salad. Pin It
Green Lentil and Vegetable Casserole served in a white dish alongside crusty bread and a green salad. | sweetsellou.com

Enjoy this nutritious and warming meal with your family and friends; it is a true testament to how delicious plant-based cooking can be.

Product image
Blend soups, smoothies, sauces, and baby food directly in pots for quick, smooth results.
Check price on Amazon

Recipe FAQs

Can I use dried herbs instead of fresh?

Yes, this dish calls for dried thyme and oregano which work beautifully. Use one-third the amount if substituting fresh herbs for dried.

How long does this keep in the refrigerator?

The casserole stores well for up to 4 days in an airtight container. Reheat individual portions in the microwave or warm the entire dish in a 350°F oven.

Can I freeze this lentil bake?

Absolutely. Cool completely, portion into freezer-safe containers, and freeze for up to 3 months. Thaw overnight in the refrigerator before reheating.

What vegetables work best in this casserole?

Root vegetables like carrots, celery, and onions provide a sturdy base. Quick-cooking vegetables such as zucchini, bell peppers, and cherry tomatoes add texture without becoming mushy during baking.

Do I need to soak the lentils first?

No soaking required for green lentils. Simply rinse them thoroughly and add directly to the pot. They cook perfectly during the simmering and baking time.

How can I add more protein?

Increase protein by adding cubed firm tofu during the sauté step, stirring in white beans with the lentils, or serving with a dollop of Greek yogurt instead of cheese.

Green Lentil Vegetable Casserole

Protein-packed green lentils baked with seasonal vegetables and aromatic herbs for a comforting vegetarian main dish.

Prep Time
20 min
Time to Cook
55 min
Time Needed
75 min
Created by Mia Lawson


Skill Level Easy

Cuisine European

Makes 4 Portions

Diet Preferences Vegetarian Option

What You'll Need

Lentils

01 1 cup green lentils, rinsed
02 3 cups vegetable broth

Vegetables

01 2 tablespoons olive oil
02 1 large onion, diced
03 2 garlic cloves, minced
04 2 medium carrots, diced
05 2 celery stalks, diced
06 1 red bell pepper, chopped
07 1 zucchini, chopped
08 1 cup cherry tomatoes, halved
09 1 cup mushrooms, sliced

Seasonings

01 1 teaspoon dried thyme
02 1 teaspoon dried oregano
03 1 teaspoon smoked paprika
04 1/2 teaspoon ground black pepper
05 1/2 teaspoon salt
06 2 tablespoons tomato paste
07 1 bay leaf

Topping

01 1/2 cup grated Parmesan cheese, optional
02 1/4 cup fresh parsley, chopped

How To Make It

Step 01

Preheat Oven: Preheat oven to 375°F.

Step 02

Sauté Aromatics: Heat olive oil in a large saucepan over medium heat. Add diced onion and minced garlic, sauté for 3 to 4 minutes until softened and fragrant.

Step 03

Cook Vegetables: Add diced carrots, celery, bell pepper, zucchini, sliced mushrooms, and halved cherry tomatoes. Cook for 5 to 6 minutes, stirring occasionally, until vegetables begin to soften.

Step 04

Build Flavors: Stir in rinsed lentils, tomato paste, dried thyme, dried oregano, smoked paprika, bay leaf, salt, and black pepper. Mix thoroughly to combine all ingredients.

Step 05

Simmer Lentils: Pour in vegetable broth and bring to a boil over medium-high heat. Reduce heat to low and simmer uncovered for 20 minutes, stirring occasionally, until lentils are just tender but not mushy.

Step 06

Transfer to Baking Dish: Remove bay leaf from the lentil mixture. Transfer the entire contents to a large ovenproof baking dish.

Step 07

Add Cheese Topping: Sprinkle grated Parmesan cheese evenly over the lentil mixture if desired.

Step 08

Bake Until Golden: Bake uncovered in the preheated oven for 25 minutes, until the top is golden brown and the mixture is bubbling at the edges.

Step 09

Rest and Garnish: Remove from oven and let rest for 5 minutes. Garnish with fresh chopped parsley before serving.

Tools You Need

  • Large saucepan
  • Ovenproof baking dish, 2-quart capacity
  • Cutting board and sharp knife
  • Wooden stirring spoon

Allergy Details

Double-check every ingredient for allergens. Speak to a healthcare professional if you have concerns.
  • Contains dairy from Parmesan cheese; omit or use vegan cheese for dairy-free preparation.
  • Contains legumes; verify personal sensitivities to lentils.
  • May contain gluten; verify broth and cheese labels for allergen information.

Nutrition Details (each serving)

These figures are for informational purposes only—not a substitute for professional advice.
  • Calorie Count: 320
  • Fat Content: 8 g
  • Carbohydrates: 47 g
  • Proteins: 16 g